KR20030035168A - Sliding Gate Valve for a Vessel Containing Molten Metal - Google Patents

Abstract

PURPOSE: A sliding gate valve for molten metal vessel is provided, wherein rid is stably closed in a sliding direction of sliding plate, and the sliding gate valve has at least a limited movement perpendicular to the sliding direction of the sliding plate. CONSTITUTION: The sliding gate valve comprises a housing(5) and a rid(7), wherein the rid(7) is rotationally mounted on refractory valve plates(11,10) in such a way that the refractory valve plates(11,10) are received in the rid(7), pressure is applied to a refractory sliding plate(12) by fixed element, the refractory sliding plate(12) is slidingly contacted with the valve plates(11,10), the rid(7) is closed in a sliding direction of the sliding plate(12) by a locking means(30), and the locking means is constructed in such a structure that the locking means(30) is automatically locked again when position of the rid(7) is changed in a sliding direction of the sliding plate(12) so that the rid is always closed while the rid is moved in a direction perpendicular to moving direction of the sliding plate(12), wherein the sliding gate valve further comprises at least one rotational pin(35) rotationally mounted on the housing(5), installed on the outer wall of a rotation shaft(31A) in a partially spiral or eccentric shape and line contacted or point contacted with the rid(7), and wherein an injection tube exchange unit(2) is arranged on the lower part of the housing(5) and the rid(7), and an exchangeable refractory injection tube(3) is pressed to a refractory plate(11) for receiving the rid(7).

Description

Sliding Gate Valve for a Vessel Containing Molten Metal}

The invention relates to a sliding gate valve for the preamble of claim 1.

An apparatus of this type is disclosed in EP-B1-0441927, the sliding gate valve comprising a fireproof top plate and a lid for fixing it, a fireproof sliding plate and a fixed fireproof bottom plate. In addition, the refractory injection tube fixed by the exchanger is connected to the refractory bottom plate and pressed against the bottom plate. The lid containing the refractory top plate compresses the top plate against the sliding plate via the stressor. This lid is fixed against displacement in the direction of movement of the sliding plate by a screw moving like a locking means. The disadvantage of this is that the screw may loosen due to the sliding plate moving forward and backward repeatedly, since the sliding plate transmits vibrations, such as a rocking motion of the lid. In addition, the lid does not move vertically to compensate for thermal expansion across sliding or other directions of movement.

Against this background, it is an object of the present invention to develop a sliding gate valve of the type having a simple structure and a stable closing of the lid in the sliding direction of the sliding plate as mentioned above, and a limited movement at least perpendicular thereto.

This object is solved in connection with the preamble of claim 1.

Due to the locking means provided in connection with the present invention, the lid is always fixed for use in place and is not limited to one fixed position. Since the lid is not firmly fixed perpendicular to the sliding direction of the sliding plate, thermal expansion can be compensated for.

In another embodiment related to the present invention, in a sliding gate valve having an injection tube exchanger, a lid aligned with the top surface of the housing is rotatably mounted to the housing, and a fixing element for pressing the valve plates against each other is provided. It is arranged in pairs on both sides of the lid and is configured as a rotating fixing bolt in the housing. This simplifies the assembly and enables the disassembly of the sliding gate valve having this functionally stable structure.

Embodiments and advantages of the present invention are described in more detail with reference to the drawings.

1 is a longitudinal sectional view of a sliding gate having a first embodiment of an injection tube exchanger;

FIG. 2 is a view of the sliding gate valve in the direction of arrow A of FIG. 1; FIG.

3 is a longitudinal sectional view of the sliding gate valve along line III-III of FIG. 1;

4 is a perspective view of the sliding gate valve for FIG. 1;

5 is a longitudinal sectional view of a sliding gate having a modified injection tube exchanger;

FIG. 6 is a plan view of the sliding gate valve of FIG. 5; FIG.

* Code Description *

1.Sliding gate valve 2..Injection tube changer

3 .... refractory injection tube 4 .... container

5 .... housing 7 .... lid

Figure 1 shows a sliding gate valve 1 in which it is shown directly mounted at the outlet of the vessel 14, the vessel being preferably tundish or continuous casting. In addition, the bottom portion of the sliding gate valve 1 is an injection tube exchanger 2, which fixes the refractory injection tube 3, extends into a continuous casting mold, and transfers molten metal from the tundish to the mold. Enable immersion injection.

The sliding gate valve 1 has a housing 5, which housing 5 is fixed to the container and for this purpose has a protruding connecting surface 6 at the top surface which connects the outer metal shell of the container. The upper and lower fixed refractory valve plates 10, 11 are housed in the housing 5, and the sliding plate 12 between the fixed refractory valve plates 10, 11 is not shown in detail, but the actuator It is moved forward and backward by the (actuator). The housing 5 is provided with a lid 7 below it. The upper valve plate 10 is fixed to the uppermost housing part, and the fixed lower plate 11 is fixed to the lid 7 by fixing means 14, 16, respectively. The sliding plate 12 is fixed to the metal frame 16 connected to the actuator. The mounting element 17 for the actuator is attached to the housing 5.

Each refractory plate 10, 11, 12 has a flow opening 18 through which molten metal is poured out of the container as shown in the open position. The outlet can be closed or throttled by the longitudinal movement of this sliding plate 12. However, the plate 12 also functions as a control element for controlling the injection volume of the melt coming out of the vessel 4.

The lid 7 is rotatably mounted about the shaft 7A as shown in FIG. 2, and the lower fireproof plate 11 is fastened to the sliding plate 12 by a fixing element. The fastening element is preferably of fastening bolts, rotates laterally into the recessed part of the housing 5, tightens and then exerts its fastening force on the valve plate. The lid 7 is conveniently mounted laterally to the rotatable nail in the housing 5, and the rotating shaft 7A is conveniently aligned in the same direction as the sliding direction of the sliding plate 12. Therefore, this rectangular lid 7 can be opened by rotating about the narrow side along this cut-off line as shown in FIG. 3, and can exchange a plate.

The exchanger 2 is mounted on the lower part of the lid 7, the injection tube 3 is adjacent to the fireproof plate 11, and fixed to the bottom side of the lid 7 as shown in FIG. 1. It is. This injection tube is fixed by a tube 20 and connected to a cylinder 22 fixed to a lid 7. With this cylinder, the injection tube 3 is pressed against the bottom plate 11. To change the injection tube, the cylinder 22 lowers the tube 3 by rotating it to a position where it can be removed.

In connection with the present invention, the locking means 30 is provided for locking the lid 7 so that it can be automatically locked again when the position of the lid 7 in the sliding direction changes in the sliding direction of the sliding plate 12 in the operating state. Structure, the lid such that the locking means 30 is always locked while the lid 7 is moving perpendicular to the sliding direction.

For this purpose, the locking means 30 has a rotating nail 35 and is mounted on a rotating shaft 31 extending in the sliding transverse direction of the plate 12 and having a spiral eccentric structure with respect to the outer wall 35 '. It is. Two bearing rings 32 are mounted to the housing 5 (FIGS. 2 and 4). Axes 31A are shown in FIGS. 1 and 2. The rotary nail 35 is in line contact or point contact with the lid 7. The shaft 31 is laterally fixed to the at least one protruding rotary lever 33 and, in the closed state, has a position substantially horizontal from the lid 7. The radius with respect to the outer wall 35 'from the rotation axis 31A of each rotation pin 35 increases in the opposite direction to the rotation direction of the rotation lever 33 when closed. Therefore, due to the weight of the rotary lever 33 itself, the rotary nail 35 is fixed to the lid 7 automatically. As the rotary lever 33 rotates clockwise in the open position with respect to FIG. 1, the lever stands upright, and the fixing device is released.

In order to achieve the same effect, the rotating nail must be mounted eccentrically on the shaft 31 and have a cylinder structure.

With respect to the structure of the locking means 30, another advantage that arises in the present invention is that the rotary lever 33 can be moved by hand without any tool to the closed or open position and can be closed stably. In addition, the rotary lever 33 has a length that cannot be in the open position in the state where the sliding gate valve 1 is installed, but can automatically move to the closed position instead.

5 and 6 show another variant of the sliding gate valve 1 'in connection with the present invention. This sliding gate valve follows its function and has the structure for the embodiment described above. Therefore, identical parts represent the same reference. The main difference with respect to one of the fixed refractory plates for receiving the lid 7 is to be aligned with the top side of the housing 5 'attachable to the container 4 and with each protruding connecting surface 6'. Substantially, the top plate 11 is received in the lid 7 'and the bottom plate 11 is received in the housing 5'. The lid 7 ′ is also rotatably aligned with respect to the axis 7 ′ extending in the sliding direction of the sliding plate 12 (FIG. 6). The plate is only replaceable when the valve 1 is removed from the container, while the lid 7 'does not open. The rectangular lid can thus be opened by rotating to a narrow side. The handle 34 is provided with a lid 7 ′ on the opposite side by means of allowing the lid to be easily opened.

In addition, two cams 38 are provided below the lid 7 ', and when the lid 7' is closed, it is connected to the recess of the housing 5 'with almost no gap. The lid 7 ′ is therefore centered in the sliding direction of the plate 12. During operation, the vibratory movement of the plate 12 is transmitted to the lid 7 'by the plates 10, 12, which are pressed against each other by the fixing elements (fixing bolts 19). However, the lid 7 ′ is held in a fixed position by the locking means 30 after a long time of operation, so that the mortar connection between the sleeve 9 and the upper valve plate 10 is not broken.

5 shows the open position of the rotary lever 33 with the reference device 33 '. In the gate position of the container 4 the rotary lever 33 cannot be in the upper position, showing that the lid 7 'is well sealed.

The injection tube 3 is adjacent to the lower fixed valve plate 11 in the housing 5 'and houses the exchanger 2' and is conventionally plated by a rocker arm 44. 11 is shown in detail compressed. Although not shown in detail, this injection tube 3 can be moved by the actuator in a direction perpendicular to the plane of the drawing and replaced by a new injection tube. Also, the exchange device for FIGS. 1 and 2 may be used in reverse.

Furthermore, the mounting element 17 ′ is not shown but is aligned with the housing 5 ′ on the opposite side of the locking means 30 relative to the actuator. This mounting element 17 ′ is mounted to the housing by a hinge 46 so as to rotate laterally.

The present invention has been described fully with respect to the two exemplary embodiments described above. The present invention can be implemented in other structures.

Claims (6)

The sliding gate valve for the molten metal storage container includes a housing 5, 5 ′ and a lid 7, 7 ′, the lids 7, 7 ′ being rotatably mounted and refractory valve plates 11, 10. ), The fixing element can apply pressure against the fire resistant sliding plate 12, the inner and sliding plates 12 are in sliding contact with the valve plates 11 and 10, and the lids 7 and 7 ') Is closed by the locking means 30 in the sliding direction of the upper half sliding plate 12, the locking means 30 in the sliding direction of the sliding plate 12 so that the lid is always closed. A sliding gate valve for a molten metal storage container having a structure that can be automatically locked again when the position of ') is changed, but which allows the lid to move in a direction perpendicular to the moving direction. 2. The lid (7, 7 ') according to claim 1, which is rotatably mounted to the housings (5, 5') and is provided on the outer wall in a partial spiral or eccentric shape with respect to the axis of rotation (31A). A sliding gate valve comprising at least one rotary pin (35) in line contact or point contact with. 3. The nail (35) according to claim 2, wherein the nail (35) has a rotating lever (33) projecting to at least one side having an approximately horizontal position with respect to the lids (7,7 ') in the locked state, and because of its weight Sliding gate valve, characterized in that it has a lever to automatically fix the rotatable nail (35) relative to (7,7 '). 4. The rotary lever (33) according to claim 3, wherein the rotary lever (33) cannot rotate to an open position (33 ') by being rotated upward with the sliding gate valve (1, 1') installed in the container (4), but automatically A sliding gate valve, characterized in that it can be moved to a horizontal locking position. The sliding gate valve according to claim 3, wherein the radius formed from the rotating shaft (31A) to the outer wall (35 ') of the rotating pin (35) increases in the direction opposite to the locking rotation direction of the rotating lever (33). . 2. An injection tube exchanger (2, 2 ') is arranged in the lower part of the housing (5') and in the lower part of the lid (7). 7) is pressed against the fireproof plate 11 to receive it.